Mixing device for inlet manifolds



Aug. 3,1926.

G. O. CHAPMAN MIXING DEVICE FOR INLET MANIFOLDS Filed Oct. 15, 1924Patented Aug. 3, 1926.

UNITED, STATES 1,594,111 PATENT" OFFICE.

. GEORGE 0. CHAPMAN, OF SANTA ANA, GALIFORId'IA.

MIXING DEVICE FOR INLET MANIFOLDS.

Application filed October 15, 1924. Serial No. 743,691.

My invention relates generally to inlet manifolds for internalcombustion engines from some rotating part of the engine with which themanifold is associated, and to arrange on said rotating member withinthe.

manifold chamber means for effecting a positive and uniform flow ofgaseous fuel through the manifold and for intensifying the mixing andcommingling of the vaporized liquidhydrocarbon and air just prior to thetime that'the mixture enters the inlet ports leading into the combustionchambers of the engine with which the manifold is associated. j L

A further object of my invention is to provide simple and eflicientmeans for causing the gaseous fuel to flow evenly and uniformly in bothdirections through the manifold from the point where said gaseous fuelenters said manifold, thereby insuring even distribution of. the gaseousfuel charges that. are taken into the combustion chambers of the engineon the suction strokes of the pistons therein, and which action insuresa uniform production of power by the engine while the same is inoperation.

With the foregoing and other objects in view, my invention consists incertain novel features of construction and arrangement of parts thatwill be hereinafter more fully described and claimed and'illustrated inthe accompanying drawings, in which- Figure 1 is a vertical sectiontaken lengthwise through the center of an inlet manifold that isconstructed in accordance with my invention; v

.Figure 2 is an elevational view of one of the rotary mixing membersused in my improved manifold and with one of the blades thereof insection; I c Figure 3 is a perspective view showing a "modified form ofone of the rotary mixing members;

Referring by numerals to the accompanying drawings, which illustrate apractical embodiment of my invention, lO-designates the body of themanifold, the same comprising a horizontally disposed tubular member,

from the central portion of which depends a tubular extension 11 that isdirectlyconnected to. a suitable source of gaseous fuel supply,preferably a carburetor. Leading from the ends of the tubular body 10are short upward and rearward extensions 12 that are connected directlyto the inlet ports or passageways that lead to the combustion chambersof the engine with which the manifold is associated. Removably seated inone end of the manifold body is a plug 13 having a centrally arrangedbearing 14 for a shaft 15, and which latter extends axially through themanifold body, its opposite end having bearing in a bracket 16 thatextends outwardly from the corresponding end of the manifold body.

This shaft may be rotated in any suitable manner, either by a train ofgearing such as 17, that is driven'from the fan belt or said shaft maybe driven by a small electric motor or from some rotating part of theenine with which the manifold is associated.

ecured to the shaft 15 at points near its center and adjacent to thepoint where "the opening in member 11 communicates with the chamber inthe manifold are small fans 18 preferably of the type having fourinclined blades.

The blades of these fans are, with respect to each other, inclined inopposite directions,

, tion indicated by the arrow in Figure 1 gaseous fuel entering thecentral portion of the manifold from member 11 will be drawn in bothdirections and forced toward the ends of the chamber within saidmanifold.

Secured on the .shaft 15 adjacent to each fan 18 and between the latterand the adj acent outlet 12 is a second fan 19, preferably of the typehaving four inclined blades, and these last mentioned fans are set orsecured upon shaft 15 so that their blades are staggered or offset withrespect to the blades of the immediately adjacent fans 18.

Secured on the shaft 15 immediately adjacent to each fan 19, and betweenthe latter and the adjacent outlet 12, is a hub 20 carryin four or moreblades 21 that are incline to correspond with the inclination of theblades of the adjacent fans 18 and .19, -and each blade 21 is providedwith a of the blades are staggered or offset with respect to each other,for by so doing the gaseous fuel passing through said slots while theblades are revolving w1ll be more thoroughly mixed and broken up than ifthe corresponding slats in the series of blades occupy the samecircumferential plane. 1

Inasmuch as the shaft 15 is driven from some part of the engine withwhich the manifold is associated, it will be understood that the saidshaft will be rotated at a speed corresponding to the speed of theengine, and as said shaft is rotated the fans 18 and 19 and the hubs 20carrying the slotted blades 21 will be revolved within the chamber inthe manifold to the sides of the extension 11 to the carburetor and as aresult gaseous fuel from said carburetor will be drawn into the centralportion of the chamber within the manifold, andvby the revolving fanssaid gaseous fuel will be forced in both directions through the manifoldtoward the outlets 12 therefrom.

The pairs of fans 18 and 19 produce a certain degree of suction withinthe central ortion of the chamber in member 10, therey constantlydrawing gaseous fuel from the carburetor, and this gaseous fuel is, bythe fans 18 and 19, forced outwardly from the center past the revolvingslotted blades 21, and as the gaseous fuel passes between these slottedblades and through the slots thereof it will be very thoroughly mixedand broken up and in such condition it will be forced with acertaindegree of ressure outthrough the outlets 12 that lea to thecombustion chambers within the engine.

Thus as lon as the engine is in operation and shaft 15 1s driven aconstant and uniform flow of gaseous fuel is delivered to the combustionchambers within the engine,

and in passing the fans, and particularly those having the slottedblades, the gaseous fuel is thoroughly 'mixed and broken up so that itwill readily ignite and burn within the combustion chambers, therebyinsuring an even flow of power from the engine.

In themodified form of gaseous fuel mixing wheel or propellerillustrated in Figure 3, a hub 23 carries a series of offset curvedprongs or fingers, such as 24. This form of mixing element may besubstituted for the hub 20 carrying the slotted blades 21, and it willbe-understood that as the fingers 24 revolve rapidly within the manifoldchamber the gas passing therethrough will be very thorough y mixed andcommingled.

Obviously, minor changes in the size, form v and construction of thevarious parts of my invention may be made and substituted for thoseherein shown and described without departing from the spirit of myinvention, the scope of which is set forth in the appended claim.

I claim as my invention:

.The combination with an inlet manifold for internal combustion engines,which man-.

GEORGE o. CHAPMAN.

